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VibeCoding 学习笔记-01 Prompt Engineering for AI Guide

  • 2026-05-07 08:44:00
VibeCoding 学习笔记-01 Prompt Engineering for AI Guide
前言:从2026年春节开始系统学习vibe coding,从CS1465起步。本系列将记录vibe coding从0-1的全过程。

来源: https://cloud.google.com/discover/what-is-prompt-engineering | 2026-05-06

读完后觉得最有价值的点是:提示词工程不是玄学,而是一套可以系统化学习和实践的技能。Google Cloud 这篇指南把提示词的底层逻辑拆解得很清楚——核心是给模型提供足够的上下文、明确的指令和恰当的示例,而不是靠"碰运气"。


我的理解是,提示词工程的本质是人机意图对齐。LLM 能力很强,但它不知道你心里想要什么,必须通过精心设计的 prompt 来传递意图。这让我想到平时用 AI 时,同样的需求换种说法结果差异巨大,其实就是因为提示词的"信息密度"和"结构清晰度"不同。

文章把 prompt 定义为"引导 AI 模型生成期望响应的输入",这个定义很准确。prompt 可以是问题、指令、代码片段,甚至是创意写作样本——形式不重要,关键是它能否有效传递任务意图。

有效提示词的四个关键要素

格式(Format):不同模型对自然语言问题、直接命令、结构化输入的响应效果不同。了解模型偏好的格式是第一步。

上下文和示例(Context & Examples):给模型设定场景、提供参考样例,能显著提升输出质量。比如想要特定风格的故事,先给几句描述 tone 的句子。

微调与适配(Fine-tuning & Adapting):根据反馈持续调整提示词,是一个迭代优化的过程。

多轮对话(Multi-turn):保持上下文连贯,让交互更自然。

六种提示词类型,从简单到复杂

类型说明适用场景
Zero-shot(直接提示)不给示例,直接下指令头脑风暴、摘要、翻译
One/Few/Multi-shot提供 1 个或多个 input-output 示例需要模型理解特定格式的任务
Chain of Thought (CoT)引导模型分步推理数学、逻辑、复杂推理
Zero-shot CoT结合 CoT 和零样本,直接要求模型展示推理步骤不想给示例但希望有推理过程

这里容易踩的坑是:不是越复杂的提示词越好。简单的 Zero-shot 在很多日常任务上已经足够,强行加示例反而可能限制模型的创造性。

六大实战策略,我挑最实用的三个展开

1. 目标要具体,别模糊

文章举的对比很直观:

不要说:"Write something about climate change"

要说:"Write a persuasive essay arguing for the implementation of stricter carbon emission regulations"

我注意到,好的提示词通常包含动作动词(summarize, analyze, translate)、输出格式(bulleted list, 500-word essay)、目标受众(non-technical audience, young adults)。这三要素基本可以作为我日常写提示词的 checklist。

2. Few-shot 是最快的质量提升手段

给模型看几个"输入-输出"示例,比写一大段规则说明更有效。比如:

Input"Cat" Output: "A small furry mammal with whiskers."Input: "Dog" Output: "A domesticated canine known for its loyalty."Prompt: "Elephant"

这个方法的核心是示范而非解释——模型从模式中学习,而不是从指令中推断。

3. Chain of Thought 让复杂任务变简单

对于需要推理的任务,明确要求模型"step-by-step"能解决很多"模型明明会但答不对"的问题。例子:

"Solve this problem step-by-step: John has 5 apples, he eats 2. How many apples does he have left? Step 1: John starts with 5 apples. Step 2: He eats 2 apples, so we need to subtract 2 from 5. Step 3: 5 - 2 = 3. Answer: John has 3 apples left."

这里有个技巧:可以要求模型"explain your thought process",这样不仅能得到答案,还能检查推理过程是否合理,方便调试。

四个主要应用场景的提示词模板

语言生成:指定 genre、tone、style、plot points

问答:区分开放式(explain the concept)和特定式(what is the capital of France)

代码生成:支持补全、翻译、优化、Debug 四种模式

图像生成:描述要细致到 objects、scenery、lighting、style

Prompt Engineering 的真正价值

除了让输出更准确,更关键的是减少偏见和有害内容增强可控性和可预测性。这意味着提示词工程不只是"让 AI 说人话",还承担着安全过滤器和行为约束的角色。

所以接下来,我打算在日常使用 AI 时实践这几点:

写提示词前先想清楚"动作+格式+受众"三要素

复杂任务先用 CoT,效果不好再考虑 Few-shot

建立个人提示词模板库,把常用的有效模式沉淀下来


相关资源:

  • Introduction to Prompt Design — Google Cloud 官方提示设计入门

  • Five Best Practices for Prompt Engineering — 更深入的工程实践建议

  • General prompt design strategies — 通用策略文档

  • Generative AI prompt samples — 官方示例集合

  • Gemini Enterprise Agent Platform — Google Cloud 的企业级 AI 平台

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  1. CONNECT:[ UseTime:0.000496s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000742s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000292s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000222s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000443s ]
  6. SELECT * FROM `set` [ RunTime:0.000202s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000488s ]
  8. SELECT * FROM `article` WHERE `id` = 486616 LIMIT 1 [ RunTime:0.000389s ]
  9. UPDATE `article` SET `lasttime` = 1778126476 WHERE `id` = 486616 [ RunTime:0.006041s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000231s ]
  11. SELECT * FROM `article` WHERE `id` < 486616 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000533s ]
  12. SELECT * FROM `article` WHERE `id` > 486616 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000450s ]
  13. SELECT * FROM `article` WHERE `id` < 486616 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000942s ]
  14. SELECT * FROM `article` WHERE `id` < 486616 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004371s ]
  15. SELECT * FROM `article` WHERE `id` < 486616 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006620s ]
0.088349s